People talking about AI dramatically underestimate complexity of intelligence. The computation power it would require to solve such complex problems and human's

People talking about AI dramatically underestimate complexity of intelligence. The computation power it would require to solve such complex problems and human's ability to comprehend such complex things. We can understand how a neuron works and even how several of them would work together. We can emulate nervous system of the simplest organism. But our brains have no physical capacity to analyze this network as a whole. Requirements of resources used to improve AI is not linear to the output. Increasing processing power in 10 times won't scale to 10 times more effective AI.